diff options
Diffstat (limited to 'arch/powerpc/kvm/Kconfig')
-rw-r--r-- | arch/powerpc/kvm/Kconfig | 91 |
1 files changed, 65 insertions, 26 deletions
diff --git a/arch/powerpc/kvm/Kconfig b/arch/powerpc/kvm/Kconfig index 711fca9bc6f0..dbfdc126bf14 100644 --- a/arch/powerpc/kvm/Kconfig +++ b/arch/powerpc/kvm/Kconfig @@ -7,7 +7,7 @@ source "virt/kvm/Kconfig" menuconfig VIRTUALIZATION bool "Virtualization" - ---help--- + help Say Y here to get to see options for using your Linux host to run other operating systems inside virtual machines (guests). This option alone does not add any kernel code. @@ -19,12 +19,9 @@ if VIRTUALIZATION config KVM bool - select PREEMPT_NOTIFIERS - select HAVE_KVM_EVENTFD + select KVM_COMMON select HAVE_KVM_VCPU_ASYNC_IOCTL - select SRCU select KVM_VFIO - select IRQ_BYPASS_MANAGER select HAVE_KVM_IRQ_BYPASS config KVM_BOOK3S_HANDLER @@ -38,12 +35,11 @@ config KVM_BOOK3S_32_HANDLER config KVM_BOOK3S_64_HANDLER bool select KVM_BOOK3S_HANDLER - select PPC_DAWR_FORCE_ENABLE config KVM_BOOK3S_PR_POSSIBLE bool select KVM_MMIO - select MMU_NOTIFIER + select KVM_GENERIC_MMU_NOTIFIER config KVM_BOOK3S_HV_POSSIBLE bool @@ -51,10 +47,12 @@ config KVM_BOOK3S_HV_POSSIBLE config KVM_BOOK3S_32 tristate "KVM support for PowerPC book3s_32 processors" depends on PPC_BOOK3S_32 && !SMP && !PTE_64BIT + depends on !CONTEXT_TRACKING_USER select KVM select KVM_BOOK3S_32_HANDLER select KVM_BOOK3S_PR_POSSIBLE - ---help--- + select PPC_FPU + help Support running unmodified book3s_32 guest kernels in virtual machines on book3s_32 host processors. @@ -69,8 +67,9 @@ config KVM_BOOK3S_64 select KVM_BOOK3S_64_HANDLER select KVM select KVM_BOOK3S_PR_POSSIBLE if !KVM_BOOK3S_HV_POSSIBLE + select PPC_64S_HASH_MMU select SPAPR_TCE_IOMMU if IOMMU_SUPPORT && (PPC_PSERIES || PPC_POWERNV) - ---help--- + help Support running unmodified book3s_64 and book3s_32 guest kernels in virtual machines on book3s_64 host processors. @@ -83,9 +82,9 @@ config KVM_BOOK3S_64_HV tristate "KVM for POWER7 and later using hypervisor mode in host" depends on KVM_BOOK3S_64 && PPC_POWERNV select KVM_BOOK3S_HV_POSSIBLE - select MMU_NOTIFIER + select KVM_GENERIC_MMU_NOTIFIER select CMA - ---help--- + help Support running unmodified book3s_64 guest kernels in virtual machines on POWER7 and newer processors that have hypervisor mode available to the host. @@ -103,23 +102,50 @@ config KVM_BOOK3S_64_HV config KVM_BOOK3S_64_PR tristate "KVM support without using hypervisor mode in host" depends on KVM_BOOK3S_64 + depends on !CONTEXT_TRACKING_USER select KVM_BOOK3S_PR_POSSIBLE - ---help--- + help Support running guest kernels in virtual machines on processors without using hypervisor mode in the host, by running the guest in user mode (problem state) and emulating all privileged instructions and registers. + This is only available for hash MMU mode and only supports + guests that use hash MMU mode. + This is not as fast as using hypervisor mode, but works on machines where hypervisor mode is not available or not usable, and can emulate processors that are different from the host processor, including emulating 32-bit processors on a 64-bit host. + Selecting this option will cause the SCV facility to be + disabled when the kernel is booted on the pseries platform in + hash MMU mode (regardless of PR VMs running). When any PR VMs + are running, "AIL" mode is disabled which may slow interrupts + and system calls on the host. + config KVM_BOOK3S_HV_EXIT_TIMING - bool "Detailed timing for hypervisor real-mode code" + bool + +config KVM_BOOK3S_HV_P9_TIMING + bool "Detailed timing for the P9 entry point" + select KVM_BOOK3S_HV_EXIT_TIMING depends on KVM_BOOK3S_HV_POSSIBLE && DEBUG_FS - ---help--- + help + Calculate time taken for each vcpu during vcpu entry and + exit, time spent inside the guest and time spent handling + hypercalls and page faults. The total, minimum and maximum + times in nanoseconds together with the number of executions + are reported in debugfs in kvm/vm#/vcpu#/timings. + + If unsure, say N. + +config KVM_BOOK3S_HV_P8_TIMING + bool "Detailed timing for hypervisor real-mode code (for POWER8)" + select KVM_BOOK3S_HV_EXIT_TIMING + depends on KVM_BOOK3S_HV_POSSIBLE && DEBUG_FS && !KVM_BOOK3S_HV_P9_TIMING + help Calculate time taken for each vcpu in the real-mode guest entry, exit, and interrupt handling code, plus time spent in the guest and in nap mode due to idle (cede) while other threads are still @@ -130,13 +156,28 @@ config KVM_BOOK3S_HV_EXIT_TIMING If unsure, say N. +config KVM_BOOK3S_HV_NESTED_PMU_WORKAROUND + bool "Nested L0 host workaround for L1 KVM host PMU handling bug" if EXPERT + depends on KVM_BOOK3S_HV_POSSIBLE + default !EXPERT + help + Old nested HV capable Linux guests have a bug where they don't + reflect the PMU in-use status of their L2 guest to the L0 host + while the L2 PMU registers are live. This can result in loss + of L2 PMU register state, causing perf to not work correctly in + L2 guests. + + Selecting this option for the L0 host implements a workaround for + those buggy L1s which saves the L2 state, at the cost of performance + in all nested-capable guest entry/exit. + config KVM_BOOKE_HV bool config KVM_EXIT_TIMING bool "Detailed exit timing" depends on KVM_E500V2 || KVM_E500MC - ---help--- + help Calculate elapsed time for every exit/enter cycle. A per-vcpu report is available in debugfs kvm/vm#_vcpu#_timing. The overhead is relatively small, however it is not recommended for @@ -146,11 +187,12 @@ config KVM_EXIT_TIMING config KVM_E500V2 bool "KVM support for PowerPC E500v2 processors" - depends on E500 && !PPC_E500MC + depends on PPC_E500 && !PPC_E500MC + depends on !CONTEXT_TRACKING_USER select KVM select KVM_MMIO - select MMU_NOTIFIER - ---help--- + select KVM_GENERIC_MMU_NOTIFIER + help Support running unmodified E500 guest kernels in virtual machines on E500v2 host processors. @@ -162,11 +204,12 @@ config KVM_E500V2 config KVM_E500MC bool "KVM support for PowerPC E500MC/E5500/E6500 processors" depends on PPC_E500MC + depends on !CONTEXT_TRACKING_USER select KVM select KVM_MMIO select KVM_BOOKE_HV - select MMU_NOTIFIER - ---help--- + select KVM_GENERIC_MMU_NOTIFIER + help Support running unmodified E500MC/E5500/E6500 guest kernels in virtual machines on E500MC/E5500/E6500 host processors. @@ -177,9 +220,8 @@ config KVM_E500MC config KVM_MPIC bool "KVM in-kernel MPIC emulation" - depends on KVM && E500 + depends on KVM && PPC_E500 select HAVE_KVM_IRQCHIP - select HAVE_KVM_IRQFD select HAVE_KVM_IRQ_ROUTING select HAVE_KVM_MSI help @@ -192,9 +234,8 @@ config KVM_XICS bool "KVM in-kernel XICS emulation" depends on KVM_BOOK3S_64 && !KVM_MPIC select HAVE_KVM_IRQCHIP - select HAVE_KVM_IRQFD default y - ---help--- + help Include support for the XICS (eXternal Interrupt Controller Specification) interrupt controller architecture used on IBM POWER (pSeries) servers. @@ -204,6 +245,4 @@ config KVM_XIVE default y depends on KVM_XICS && PPC_XIVE_NATIVE && KVM_BOOK3S_HV_POSSIBLE -source "drivers/vhost/Kconfig" - endif # VIRTUALIZATION |